react-native-builder-bob/lib/src/utils/isCodegenSpec.js

CLI to build JavaScript files for React Native libraries

import fs from 'fs-extra';
export function isCodegenSpec(filepath) {
    const looksLikeCodgenSpec = /(?:^|[\\/])(?:(\w+)NativeComponent)\.[jt]sx?$/i.test(filepath);
    if (looksLikeCodgenSpec) {
        // This is used in the babel plugin so needs to be synchronous
        const content = fs.readFileSync(filepath, 'utf8');
        // Regex taken from https://github.com/facebook/react-native/blob/271232d85654cee32322b1c8a3a39ef647ad02e2/packages/react-native-babel-preset/src/configs/main.js#L78C24-L78C47
        if (/\bcodegenNativeComponent</.test(content)) {
            return true;
        }
    }
    return false;
}
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